SB2026102965 - Use-after-free in Linux kernel rds

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-99212)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to potentially cause a denial of service.

The vulnerability exists due to use-after-free in the Linux kernel's rds_rdma_cm_event_handler_cmn() function when RDMA route resolution fails synchronously while handling RDMA_CM_EVENT_ADDR_RESOLVED. A local user can exploit the stale connection identifier retained by RDS after such a failure to potentially cause a kernel crash when connection shutdown accesses and destroys the already freed identifier.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/91ece3efa064f0b3b3c67b9b045d9eeb4a034e43
• https://git.kernel.org/stable/c/98d446b7c013254a8a7b49720557676a3a851fde
• https://git.kernel.org/stable/c/a7c7d0ff876377fea7ae876a28d6df8d9349df57